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Ferri-kaersutite

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Formula:
NaCa2(Mg3Fe3+Ti)(Al2Si6O22)O2
The Kaersutite group minerals are WO2- dominant amphiboles defined with :
A(Na+K+2Ca)> 0.5 apfu,
B: Ca dominant
CTi > 0.5 apfu and
WO > 1.0 apfu


Ferri-kaersutite is defined with
A position: Na dominant
C2+ position: Mg dominant
C3+ position: Fe dominant
System:
Monoclinic
Ferri-kaersutite was originally described from the Deeti volcanic cone, Gregory Rift, Rift Valley Province, Kenya (IMA2011-035). This material was later renamed Oxo-magnesio-hastingsite by Zaitsev et al.(2013) in the aftermath of the 2012 amphibole nomenclature report. Ferri-kaersutite was published from Harrow Peaks, Victoria Land, Eastern Antarctica, Antarctica by Gentili et al. (IMA 2014-051).

Classification of Ferri-kaersutite

Approved 2014
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Type Occurrence of Ferri-kaersutite

Place of Conservation of Type Material:
Type material is deposited in the collections of the Museo di Storia Naturale, Universita` di Pisa, Via Roma 79, Calci (Pisa), Italy, catalogue number 19689
Year of Discovery:
2014

Crystallography of Ferri-kaersutite

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/m
Space Group Setting:
C2/m
Cell Parameters:
a = 9.8378(8) Å, b = 18.0562(9) Å, c = 5.3027(4) Å
β = 105.199(9)°
Ratio:
a:b:c = 0.545 : 1 : 0.294
Unit Cell Volume:
V 908.99 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction Data:
d-spacingIntensity
8.4(s)
3.379(ms)
3.266(m)
3.115(ms)
2.938(m)
2.707(s)
2.598(ms)

Chemical Properties of Ferri-kaersutite

Formula:
NaCa2(Mg3Fe3+Ti)(Al2Si6O22)O2

The Kaersutite group minerals are WO2- dominant amphiboles defined with :
A(Na+K+2Ca)> 0.5 apfu,
B: Ca dominant
CTi > 0.5 apfu and
WO > 1.0 apfu


Ferri-kaersutite is defined with
A position: Na dominant
C2+ position: Mg dominant
C3+ position: Fe dominant
All elements listed in formula:

Relationship of Ferri-kaersutite to other Species

Other Members of Group:
Ferro-kaersutite{Na}{Ca2}{Fe32+AlTi}(Al2Si6O22)O2
Kaersutite{Na}{Ca2}{Mg3AlTi}(Al2Si6O22)O2

Other Information

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Ferri-kaersutite

Reference List:
Kent Brooks, R.G Platt (1975): Kaersutite-bearing gabbroic inclusions and the late
dike swarm of Kangerdlugssuaq, East Greenland. Mineralogical Magazine. 40, 259-283

Zaitsev, A.N., Avdontseva, E.Y.,Britvin, S.N., Deme´ny, A., Homonnay, Z., Jeffries, T., Keller, J., Krivovichev, V.G., Markl, G., Platonova, N.V., Siidra, O.I. and Spratt, J. (2011): Ferrikaersutite, IMA 2011-035.CNMNC Newsletter No. 10, October 2011, page 2556

Frank C. Hawthorne, Roberta Oberti, George E. Harlow, Walter V. Maresch, Robert F. Martin, John C. Schumacer, Mark D. Welch (2012): Nomenclature of the amphibole supergroup. American Mineralogist. 97, 2031–2048.

Zaitsev A N, Avdontseva E Y, Britvin S N, Demény A, Homonnay Z, Jeffries T E, Keller J, Krivovichev V G, Markl G, Platonova N V, Siidra O I, Spratt J, Vennemann T (2013) Oxo-magnesio-hastingsite, NaCa2(Mg2Fe3+3)(Al2Si6)O22O2, a new anhydrous amphibole from the Deeti volcanic cone, Gregory rift, northern Tanzania. Mineralogical Magazine 77, 2773-2792

Gentili, S., Biagioni, C., Comodi, P., Pasero, M., McCammon, C. and Bonadiman,
C. (2014) Ferri-kaersutite, IMA 2014-051. CNMNC Newsletter No. 22, October 2014, page 1245; Mineralogical Magazine, 78, 1241--1248.

Internet Links for Ferri-kaersutite

Localities for Ferri-kaersutite

map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Antarctica (TL)
 
  • Eastern Antarctica
    • Victoria Land
Gentili, S., Biagioni, C., Comodi, P., Pasero, M., McCammon, C. and Bonadiman, C. (2014) Ferri-kaersutite, IMA 2014-051. CNMNC Newsletter No. 22, October 2014, page 1245; Mineralogical Magazine, 78, 12411248.
Germany
 
  • Rhineland-Palatinate
    • Eifel
      • Mendig
        • Bell
Nikita Chukanov exchange list
Greenland
 
  • Sermersooq
Kent Brooks, R.G Platt (1975): Kaersutite-bearing gabbroic inclusions and the late dike swarm of Kangerdlugssuaq, East Greenland. Mineralogical Magazine Vol 40 pp 259-283
Mineral and/or Locality  
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